It was freezing out there even in his buttoned-up overcoat.外面非常冷，即使穿上大衣扣上扣子也不顶事。She very nearly tore my overcoat.她差点把我的大衣扯破了。He picked off the burs that had stuck to his overcoat.他摘下粘在外衣上的刺果....
His dog is too wild, so it is hard to keep under control.他的狗太野了, 所以很难去控制它.We should try to keep under control and put it to the best use of mankind.我们应该使之置于我们控制之下,使其为人类发挥出最大作用....
Vaccination immunizes people against smallpox.种牛痘可以免患天花.Vaccination immunizes one against smallpox.接种牛痘能使人免患天花.A health worker immunizes an infant in Nepal.医疗工作者在尼泊尔为婴儿注射预防针....